.a{
  background-color: aqua;
  display: flex;
}
.box{
    width: 100px;
    height: 100px;
    background-image: url(../asset/Capture001.png);
    display: flex;
}
.box1{
    width: 100px;
    height: 100px;
    background-image: url(../asset/PC-图标_阀门关闭.svg);
}